BRUSSELS -- Looking to cut Net deals over some sushi and chardonnay? Not in Jean-Pierre Bobbaers' backyard. While the "Last Tuesday" gatherings he hosts behind his design firm have raw fish and wine, the publicity-hungry entrepreneurs who he thinks are hijacking his beloved Internet aren't invited.

Many longtime Internet users, like the energetic 42-year-old Belgian, hopped on when the Net was little more than a way to connect with other people: Mr. Bobbaers proudly claims to be the 256th person in Belgium to...